there was a sign on harry truman's desk that said, "the buck stops here." obviously there may be a sign on president obama's that he can says "the buck stops over there." >> shepard: some republicans are questioning the timing of secretary clinton's comments last evening, just hours before what analysts say could be a make or break debate for the president. we have team fox coverage tonight. ed, what can we expect from the president tonight? >> when you talk to the president's senior-most advisors, they know he has a lot riding on this, and expect him to be much more aggressive. they acknowledge he was too passive in denver, and know essentially his political career is riding on this, because he has to shake up the narrative and show in fact that he's going to fight for this, fight to keep his job, but i can tell you while his aides say that he was sort of cracking the books and studying a bit harder in the debate prep in williamsburg, virginia, this time around, they say for somebody who's under a lot of pressure he was pretty calm and cool. in fact, when